assuming your in luck and able to install the rings. put the the
line on-stream and after several months a leak was noticed where
the rings are located (just one scenario). man, i hate to be in the
shoes of the guy charge with fixing it. case of save now but pay big
time later.
- In PipingDesign@yahoogroups.com, Smithin Patil
<smithin_patil@...> wrote:
>
> Dear All,
>
> Pipe Material is A691 Gr. 1.1/4 CR CL.22
>
> Thickness for pipes under internal pressure is calculated as per
ASME B31.3 Para 304.1.2.
>
> As per licenser requirement D/t ratio must not exceed 100.
>
> In one of the piping class for NPS 60 the thickness obtained is
12.7 mm but it does not meet D/t ratio criteria.
>
> My question is : Can we use stifferner ring instead of
increasing pipe thickness because if we increase pipe thickness then
we have to perform PWHT according to B31.3. Stifferner ring is
calculated as per ASME Sec VIII Div. 1.
> Can stifferner ring compensate the thicknesses for pipes having
internal pressure.
>
> Please suggest.
>
> Thank you & Best Regards
>
>
> ---------------------------------
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> [Non-text portions of this message have been removed]
>
Received on Sat Dec 23 00:08:00 2006